Upgrade the operating system to the latest release from the command-line.
This is the preferred command if the machine has no graphic environment
or if the machine is to be upgraded over a remote connection.

OPTIONS

-h, --help
show help message and exit
-d, --devel-release
Check if upgrading to the latest devel release is possible

This works for me (Kubuntu) while update-manager does not (not present).
– sje397May 2 '11 at 0:00

Checking for a new Ubuntu release Get:1 Upgrade tool signature [198 B] Get:2 Upgrade tool [1,148 kB] Fetched 1,148 kB in 6s (58.3 kB/s) authenticate 'trusty.tar.gz' against 'trusty.tar.gz.gpg' extracting 'trusty.tar.gz' Can not run the upgrade This usually is caused by a system where /tmp is mounted noexec. Please remount without noexec and run the upgrade again.
– Adithya ChakilamMay 3 '14 at 5:20

3

Editing /etc/update-manager/release-upgrades to prompt=normal will let you get non-LTS releases that should be more stable than the latest devel release.
– syvexFeb 17 '16 at 21:36

This solution does not work for me, it tells me that there is no new release.
– user364819Sep 3 '16 at 19:12

2

As syvex mentions, edit /etc/update-manager/release-upgrades and change prompt=lts to prompt=normal otherwise the dev release will not be offered. This should be added to the answer...
– CasDec 20 '16 at 17:03